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Reference · stzList

InsertAfter()

InsertAfter(:ItemAtPosition = n, item): NON-mutating -- returns the -- would-be list with item inserted after position n, leaving This as-is -- (use InsertAfterPosition for the mutating form).

Basic examples (2)

Softanza
o1 = new stzList([ "A1", "A2", "A3" ])
o1.InsertAfter( :ItemAtPosition = 3, "A4" )
? o1.Content()
Output
A1
A2
A3

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 364_insertafter.ring(opens in a new tab)

Softanza
o1 = new stzList([ "a", "b", "C", "D", "e" ])
o1.InsertAfterW( '{ Q(This[@i]).IsLowercase() }', "*" )
? @@( o1.Content() )
Output
[ "a", "*", "b", "*", "C", "D", "e", "*" ]

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from 565_insertafterw.ring(opens in a new tab)

Scope (1)

Softanza
o1 = new stzList([ "a", "b", "C", "D", "e" ])
o1.InsertAfterWF( func x { return Q(x).IsLowercase() }, "*" )
? @@( o1.Content() )
Output
[ "a", "*", "b", "*", "C", "D", "e", "*" ]

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from 566_insertafterwf.ring(opens in a new tab)

The extensions of this method

Each extension, and whether it exists for this method; an extension that exists combines with the others (FindSTCS).

Extension
Exists
What it adds · The names
Q
no
does what the method does, then returns the object, so the call can be chained
QQ
no
chains on the next, more specific type of object (the Q ladder)
QQQ
no
chains on the most specific type of object (the Q ladder)
QRT
no
returns the result as an object of the requested type
CS
no
takes a case-sensitivity flag
ST
no
takes the position to start from (StartingAt)
IB
no
takes bounds that are included (IncludingBounds)
XT
no
the extended form: more parameters than the base method
XTT
no
yet another extension: a further extended form, after XT
Z
no
includes the position in what it returns
ZZ
no
returns positions as sections, [start, end]
W
yes
selects by a condition · InsertAfterW
WF
yes
selects by a condition, with the expressive keywords (@NextItem, @PreviousItem...) · InsertAfterWF
D
no
takes a direction, forward or backward (Directional)
F
no
takes a function (the condition or the update is given as a function); the forms document also uses F for the future form, which defers the action
Many
no
works on a collection of items instead of one (the plural form)
Except
no
takes exceptions, what to leave out (the exceptional form)
U
no
returns the result without duplication

Every example is a test file of the library, run inside the library for this page; only those whose output kept every promise their file wrote are shown.

See also